Headphone



FIG. 1 is a perspective view of the headphone showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a rear elevation view thereof; and,

FIG. 7 is a front elevation view thereof.

The evenly broken lines in the drawings illustrate portions of the article that form no part of the claim. 

CLAIM The ornamental design for a headphone, as shown and described. 